prov:value
| - Examples of surfaces may be any hard surface such as metal, plastics, rubber, board, glass, wood, paper, concrete, rock, marble, gypsum and ceramic materials which optionally are coated, e.g. with paint, enamel etc.; or any soft surface such as fibers of any kind (yarns, textiles, vegetable fibers, rock wool, hair etc.); or porous surfaces; skin (human or animal); keratinous materials (nails etc.)
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